Door-frame for furnaces.



Patented Nov. l9, |90l..

N. MGCUNNELL.

DOOR FRAME FOR FURNACES.

(Application filed. Jan. 20, 1897.)

2 Sheets-Sheet I.

(No Model.)

a :i m EEEEE; J

INVENTO 0mm MM Patented Nov. I9, I90l.

N. MGCONNELL.

DOOR FRAME FOB FURNACES.

(Applieation'flled Jan. 2Q, 1897.)

2 Sheets-Sheet 2.

(No Model.)

WITNESSES UNITED STATES PATENT OFFICE.

NIVEN MCCONNELL, OF MUNHALL, PENNSYLVANIA.

DOOR-FRAME FOR FURNACES.

srncrrrcarron formingpart of Letters Patent No. 687,051, dated November 19, 1901.

Application filed January 20, 1897. ri 1N0- 619,854- (No model.)

To all whom it may concern:

Be it known that I, NIVEN MoCoNNnLL, of Munhall,in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Door-Frames for Furnaces, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which-- Figure 1 is a vertical section of an openhearth steel-furnace, the section being taken through the charging-door of the furnace and showing my improved door-frame. Fig. 2 is a front elevation of the door-frame, and Fig. 3 is a horizontal section on the irregular line III III of Fig. 2.

As shown in the drawings, the door-frame consists of a casting 2, which is built in the side of the furnace and has an opening 3 for the doorway, at the sides'of which the casting is formed with vertical guideways at, constituted 'by outwardly projecting ridges. The space 5, in which the door moves between the guideways 4, is not so prominent as said guideway's and the bottom sill 6, so that it constitutes a recess for the door. The en tire casting, comprising the middle portion 5, the guideways 4:, and the sill 6, is hollow, and above the doorway 3 the casting is provided with an internal partition 7, dividing it into two parts and providing for a complete water circulation throughout, as stated below.

A water-inlet pipe'8 enters at one side of the partition, and an outlet-pipe 9 leads from the other side thereof, so that when the doorframe is in place and the water connections are fitted a constant stream of water may be maintained through the entire casting, passing around the same from the inlet to the outlet in the manner shown by arrows in the drawings. The casting is held in place by bolts 10, extending through holes at the upper part of the casting, and bolts 11 through holes in the sill.

It will be noticed that the sides of the charging-hole 3 in the casting instead of being vertical incline inwardly toward the bottom, as at b b. The brickwork back of the casting is built on the same lines, and as the brickwork at the side of the door is thus wider at the bottom than at the top it affords a construction not liable to be destroyed and undermined by action of the heat or to be bruised in charging the furnace, and the structure is therefore rendered very durable. Furthermore, it is often necessary during the running of the furnace to raise the door partly for the purpose of introducing ore or some other material, but without raising it to its full height. In such case the narrow width of the doorway at the bottom reduces to a minimum the exposure of the workmen to the intense heat of the flame. I

The advantages of my improved device will be appreciated by those skilled in the art. The door-frame being thoroughly watercooled and fitting against the brickwork around the doorway keeps the brickwork cool, prevents the brickwork and the door itself from destruction, and is a protection to the workmen against the excessive heat radiating from the furnace. The upper part of the door-frame fits against the supportingchannel 12 of the roof and protects the same from destruction even in cases where the framework below it may be eaten away, thus leaving it exposed to the direct heat of the furnace.

Within the scope of my invention as defined in the claim many changes in the form and arrangement of the parts may be made by the skilledmechanic.

I do not claim, broadly, any furnace-door protected by. water-cooling; but

What I do claim is- A door-frame consisting of a hollow watercooled' casting formed with a door-opening, the sides of which are downwardly and inwardly inclined.

In testimony whereof I have hereunto set my hand.

NIVEN MOOONNELL.

Witnesses:-

G. I. HOLDSHIP, H. M. OoRwIN. 

